Search results for 'Coordinates' (try it on Scholar)

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  1. James Lindesay (2007). Coordinates with Non-Singular Curvature for a Time Dependent Black Hole Horizon. Foundations of Physics 37 (8):1181-1196.score: 18.0
    A naive introduction of a dependency of the mass of a black hole on the Schwarzschild time coordinate results in singular behavior of curvature invariants at the horizon, violating expectations from complementarity. If instead a temporal dependence is introduced in terms of a coordinate akin to the river time representation, the Ricci scalar is nowhere singular away from the origin. It is found that for a shrinking mass scale due to evaporation, the null radial geodesics that generate the horizon are (...)
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  2. W. J. Holly (1986). The Spatial Coordinates of Pain. Philosophical Quarterly 36 (July):343-356.score: 15.0
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  3. Joseph Levy (2004). Experimental and Real Coordinates in Space-Time Transformations. Foundations of Physics 34 (12):1905-1922.score: 12.0
    The experimental (apparent) space-time transformations connect coordinates altered by length contraction and clock retardation. When clocks are synchronized by means of light signals (Einstein–Poincaré procedure) or by slow clock transport, the experimental space-time. transformations assume the mathematical form of the “Extended space-time transformations”.(4) These reduce to the Lorentz–Poincaré transformations when one of the frames they connect is the fundamental inertial frame. If the synchronization procedure were perfect, the experimental space-time transformations would assume the form of Selleri’s inertial transformations.(5) The (...)
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  4. Gary R. Gruber (1976). On the Transition From Classical to Quantum Mechanics in Generalized Coordinates. Foundations of Physics 6 (1):111-113.score: 12.0
    The classical Hamiltonian in generalized coordinates is given asH=1/2 Σ i.k p i g ik p k . We show that there is no operator of the formP i= −iA(qi) (∂/∂qi)+Gi(qi) (note that the Hermitian momentum operatorP i H is of this form) such that the quantum Hamiltonian operatorH Q is given asH Q =1/2 Σ i,k P i g ik P k or1/2 Σ i,k g ik P i P k , etc. In order to maintain a direct (...)
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  5. Robert A. Leacock (1987). The Physical Properties of Linear and Action-Angle Coordinates in Classical and Quantum Mechanics. Foundations of Physics 17 (8):799-807.score: 12.0
    The quantum harmonic oscillator is described in terms of two basic sets of coordinates: linear coordinates x, px and angular coordinates eiφ, Pφ (action-angle variables). The angular “coordinate” eiφ is assumed unitary, the conjugate momentum pφ is assumed Hermitian, and eiφ and pφ are assumed to be a canonical pair. Two transformations are defined connecting the angular coordinates to the linear coordinates. It is found that x, px can be physical, i.e., Hermitian and canonical, only (...)
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  6. J. P. Kobus (1974). Gravitational Radiation in Spherical Coordinates. Foundations of Physics 4 (2):291-297.score: 12.0
    The law of gravitation is taken in the formR 44=0, whereR 44 is the time curvature component of the Ricci tensor. Space-time separable equations are developed in spherical coordinates for the nonlinear wave equation determined byR 44=0. One exact solution is examined in detail.
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  7. Cosma Rohilla Shalizi (2004). Functionalism, Emergence, and Collective Coordinates: A Statistical Physics Perspective on “What to Say to a Skeptical Metaphysician”. Behavioral and Brain Sciences 27 (5):635-636.score: 12.0
    The positions Ross & Spurrett (R&S) take on issues of information, causality, functionalism, and emergence are actually implicit in the theory and practice of statistical physics, specifically in the way it relates macroscopic collective coordinates to microscopic physics. The reasons for taking macroscopic physical variables like temperature or magnetization to be real apply equally to mental properties like pain.
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  8. John P. Ralston (2000). Embedding Coordinates for the Well-Dressed Quark. Foundations of Physics 30 (4):493-518.score: 12.0
    Traditional lore holds that there is only one way to represent local symmetry, leading to practically unique gauge theories. However there is more than one path to local symmetry. Here I discuss expressing the theory of dressed quarks, gluons and other particles using new variables. The gauge sector is expressed with fields ea μ which transform homogeneously like matter fields under the gauge group. Consistency requires further embedding in a larger global group. Many interesting topics of gauge theories, from the (...)
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  9. J. M. Domingos & M. H. Caldeira (1984). Self-Adjointness of Momentum Operators in Generalized Coordinates. Foundations of Physics 14 (2):147-154.score: 12.0
    The aim of this paper is to contribute to the clarification of concepts usually found in books on quantum mechanics, aided by knowledge from the field of the theory of operators in Hilbert space. Frequently the basic distinction between bounded and unbounded operators is not established in books on quantum mechanics. It is repeatedly overlooked that the condition for an unbounded operator to be symmetric (Hermitian) is not sufficient to make it self-adjoint. To make things worse, nearly all operators in (...)
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  10. M. Kawato (1996). The Common Inverse-Dynamics Motor-Command Coordinates for Complex and Simple Spikes. Behavioral and Brain Sciences 19 (3):462-464.score: 12.0
    Recent advanced statistical analysis of complex spikes has revealed that their instantaneous firing rate within a time bin of a few milliseconds carries information if many trials are averaged, as happens in motor learning. The firing rate encodes sensory error signals in the inverse-dynamics motor-command coordinates, and these are exactly the same coordinates as for simple spikes. This strongly supports the most critical assumption of the feedback-error-learning model and argues against several hypotheses about the functions of the complex (...)
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  11. Paul J. DeHart (2010). Ter Mundus Accipit Infinitum: The Dogmatic Coordinates of Schleiermacher's Trinitarian Treatise. Neue Zeitschrift für Systematische Theologie Und Religionsphilosophie 52 (1):17-39.score: 10.0
    The brief coda devoted to the Trinity in Schleiermacher's The Christian Faith does not intend to marginalize the doctrine. It indicates that the doctrine, though at present still to be completed, is the recapitulation of the entire scheme of redemption. The central structuring concept in that scheme is that of the genuine union between the divine existence of the infinite creator and human nature in Christ, a pattern replicated in the coming of the Holy Spirit as the inauguration of a (...)
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  12. Rafael-Andrés Alemañ-Berenguer (2011). Epistemologic Controversy on Quantum Operators. Principia 14 (2):241-253.score: 9.0
    Since the very begining of quantum theory there started a debate on the proper role of space and time in it. Some authors assumed that space and time have their own algebraic operators. On that basis they supposed that quantum particles had “coordinates of position”, even though those coordinates were not possible to determine with infinite precision. Furthermore, time in quantum physics was taken to be on an equal foot, by means of a so-called “Heisenberg’s fourth relation of (...)
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  13. Hristu Culetu (2005). Λ and the Heisenberg Principle. Foundations of Physics 35 (9):1511-1519.score: 9.0
    A time dependent “cosmological constant” Λ(t) is conjectured, in terms of the Gaussian curvature of the causal horizon. It is nonvanishing even in Minkowski space because of the lack of informations beyond the light cone. Using the Heisenberg Principle, the corresponding energy of the quantum fluctuations localized on the past or future null horizons is proportional to Λ1/2.We compute Λ(t) for the (Lorenzian version) of the (conformally flat) Hawking wormhole geometry (written in static spherical Rindler coordinates) and for the (...)
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  14. John Norton (1989). Coordinates and Covariance: Einstein's View of Space-Time and the Modern View. [REVIEW] Foundations of Physics 19 (10):1215-1263.score: 9.0
    Where modern formulations of relatively theory use differentiable manifolds to space-time, Einstein simply used open sets of R 4 , following the then current methods of differential geometry. This fact aids resolution of a number of outstanding puzzles concerning Einstein's use of coordinate systems and covariance principles, including the claimed physical significance of covariance principles, their connection to relativity principles, Einstein's apparent confusion of coordinate systems and frames of reference, and his failure to distinguish active and passive transformations, especially in (...)
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  15. Charles S. Travis (1972). Reference and Spatio-Temporal Coordinates. Canadian Journal of Philosophy 1 (3):295 - 314.score: 9.0
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  16. Gary R. Gruber (1971). Quantization in Generalized Coordinates. Foundations of Physics 1 (3):227-234.score: 9.0
    The operator form of the generalized canonical momenta in quantum mechanics is derived by a new, instructive method and the uniqueness of the operator form is proven. If one wishes to find the correct representation of the generalized momentum operator, he finds the Hermitian part of the operator —iħ ∂/∂q, whereq q is the generalized coordinate. There are interesting philosophical implications involved in this: It is like saying that a physical structure is composed of two parts, one which is real (...)
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  17. Abraham Edel (1947). Coordinates of Criticism in Ethical Theory. Philosophy and Phenomenological Research 7 (4):543-577.score: 9.0
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  18. J. Brian Pitts (2012). The Nontriviality of Trivial General Covariance: How Electrons Restrict 'Time' Coordinates, Spinors (Almost) Fit Into Tensor Calculus, and of a Tetrad is Surplus Structure. Studies in History and Philosophy of Science Part B 43 (1):1-24.score: 9.0
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  19. Ruth Ap Roberts (1993). Coordinates of Anglo-American Romanticism (Review). Philosophy and Literature 17 (2):398-399.score: 9.0
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  20. Pierre Jacob & Frédérique de Vignemont (2010). Spatial Coordinates and Phenomenology in the Two-Visual Systems Model. In N. Gangopadhay, M. Madary & F. Spicer (eds.), Perception, Action, and Consciousness. Oxford University Press.score: 9.0
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  21. Satoshi Shioiri Taiga Tsuchiai, Kazumichi Matsumiya, Ichiro Kuriki (2012). Implicit Learning of Viewpoint-Independent Spatial Layouts. Frontiers in Psychology 3.score: 9.0
    We usually perceive things in our surroundings as unchanged despite viewpoint changes caused by self-motion. The visual system therefore must have a function to process objects independently of viewpoint. In this study, we examined whether viewpoint-independent spatial layout can be obtained implicitly. For this purpose, we used a contextual cueing effect, a learning effect of spatial layout in visual search displays known to be an implicit effect. We compared the transfer of the contextual cueing effect between cases with and without (...)
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  22. H. A. Toops (1922). Solving Intercorrelations by Polar Coördinates. Journal of Experimental Psychology 5 (1):68.score: 9.0
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  23. Taiga Tsuchiai, Kazumichi Matsumiya, Ichiro Kuriki & Satoshi Shioiri (2012). Implicit Learning of Viewpoint-Independent Spatial Layouts. Frontiers in Psychology 3.score: 9.0
    We usually perceive things in our surroundings as unchanged despite viewpoint changes caused by self-motion. The visual system therefore must have a function to process objects independently of viewpoint. In this study, we examined whether viewpoint-independent spatial layout can be obtained implicitly. For this purpose, we used a contextual cueing effect, a learning effect of spatial layout in visual search displays known to be an implicit effect. We compared the transfer of the contextual cueing effect between cases with and without (...)
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  24. Richard A. Andersen (1985). Head-Centered Coordinates and the Stable Feature Frame. Behavioral and Brain Sciences 8 (2):289-290.score: 9.0
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  25. M. G. Iaroshevskii (1997). The Social and Psychological Coordinates of Scientific Creativity. Russian Studies in Philosophy 36 (3):74-89.score: 9.0
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  26. Carmena Jose (2011). Oscillatory Phase Coupling Coordinates Anatomically-Dispersed Functional Cell Assemblies. Frontiers in Human Neuroscience 5.score: 9.0
  27. Alexandros Kitroeff (1987). Iosipos Moisiodax: The Coordinates of Balkan Thought in Eighteenth Century. History of European Ideas 8 (2):244-245.score: 9.0
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  28. Alexandre Pouget, Jean-Christophe Ducom, Jeffrey Torri & Daphne Bavelier (2002). Multisensory Spatial Representations in Eye-Centered Coordinates for Reaching. Cognition 83 (1):1-11.score: 9.0
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  29. N. Sanchez & B. F. Whiting (1986). Quantum Fields, Curvilinear Coordinates, and Curved Space-Time. In. In Roger Penrose & C. J. Isham (eds.), Quantum Concepts in Space and Time. New York ;Oxford University Press. 1--318.score: 9.0
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  30. S. Abdoo (1984). Hardy's Jude: The Pursuit of the Ideal as Tragedy in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:307-318.score: 9.0
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  31. M. Alexander (1984). Fallings From Us, Vanishings...: Composition and the Structure of Loss in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. [REVIEW] Analecta Husserliana 18:91-97.score: 9.0
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  32. M. -T. Bertelloni (1984). Why Be a Poet? In The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:37-45.score: 9.0
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  33. J. L. Bradshaw, N. C. Nettleton, J. M. Pierson, L. E. Wilson, G. Nathan & M. Jeannerod (1987). Coordinates of Extrapersonal Space. In M. Jeannerod (ed.), Neurophysiological and Neuropsychological Aspects of Spatial Neglect. Elsevier Science Ltd. 41.score: 9.0
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  34. David Carmel, Shlomo Bentin, Chang Hong Liu, Avi Chaudhuri, David A. Lagnado & David R. Shanks (2002). Alexandre Pouget, Jean-Christophe Ducom, Jeffrey Torri and Daphne Bavelier (University of Rochester) Multisensory Spatial Representations in Eye-Centered Coordinates for Reaching, B1–B11. Cognition 83:323-325.score: 9.0
     
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  35. Victor Carrabino (1984). The French Nouveau Roman: The Ultimate Expression of Impressionism in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:261-270.score: 9.0
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  36. Marcel Danesi (1989). The Neurological Coordinates of Metaphor. Communication and Cognition 22 (1):73-86.score: 9.0
     
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  37. C. Eykman (1984). What Can the Poem Do Today? The Self-Evaluation of Western Poets After 1945 in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:141-156.score: 9.0
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  38. Lm Findlay (1984). From Helikon to Aetna: The Precinct of Poetry in Hesiod, Empedokles, Holderlin, and Arnold in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:119-140.score: 9.0
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  39. J. Garelli (1984). The Act of Writing as an Apprehension of the Enigma of Being-in-the-World in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:451-477.score: 9.0
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  40. Jesse Gellrich (1984). The Structure of Allegory in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:505-519.score: 9.0
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  41. Anna Grzegorczyk (1996). Non-Cartesian Coordinates in the Contemporary Humanities. Poznan Studies in the Philosophy of the Sciences and the Humanities 47:75-98.score: 9.0
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  42. Lewis I. Held (1995). Axes, Boundaries and Coordinates: The ABCs of Fly Leg Development. Bioessays 17 (8):721-732.score: 9.0
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  43. Armin Hemmerling (1994). Navigation Without Perception of Coordinates and Distances. Mathematical Logic Quarterly 40 (2):237-260.score: 9.0
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  44. E. Kaelin (1984). Toward a Theory of Contemporary Tragedy in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:341-361.score: 9.0
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  45. B. Kennedy (1984). The Re-Emergence of Tragedy in Late Medieval England: Sir Thomas Malory's Morte Darthur in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:363-378.score: 9.0
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  46. M. Kronegger (1984). Literary Impressionism and Phenomenology: Affinities and Contrasts in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:521-533.score: 9.0
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  47. M. Kronegger (1984). The Birth of Tragedy Out of the Spirit of Music: Claudel, Milhaud and the Oresteia in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:273-293.score: 9.0
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  48. J. Lyons (1984). Tragic Closure and the Cornelian Wager in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:409-415.score: 9.0
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  49. F. Martinez-Bonati (1984). Fiction and the Transposition of Presence in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:495-504.score: 9.0
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  50. J. Margolis (1984). The Problem of Reading, Phenomenologically or Otherwise in The Existential Coordinates of the Human Condition: Poetic, Epic, Tragic. The Literary Genre. Analecta Husserliana 18:559-568.score: 9.0
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